A: Thank you for your question. This is a battery powered unit that will not function without batteries.
A: No. It has to have 9v in it
A: Thank you for your question. If the alarm is exposed to 400 ppm of CO, It must alarm between 4 and 15 minutes. If you have any additional questions, please don't hesitate to reach out directly to our Support Team at First Alert at at 1 (800)-323-9005.
A: Thank you for your question. We recommend not placing in areas where temperature is colder than 40˚ F (4˚ C) or hotter than 100˚ F(38˚ C).
A: This particular model takes 9 volt
A: Two screws in the wall and it slides onto them